中国科学院南京天文光学技术研究所机构知识库

Tis paper optimizes the design and analysis of the mechanical test platform for the scientifc probe module of the Cool Planet Imaging Coronagraph,which is the ffth part of the China Space Station survey Telescope.First,according to the module layout and economic requirements,the preliminary structural design of the module mechanical test platform is carried out, and the stifness sensitive parameters of the assembly are identifed to determine the optimization parameters.Te central composite design method is used to design the test platform,and a third-order regression model is constructed for response surface analysis.Te third-order response surface model of the fundamental frequency and amplitude of the test platform is obtained by ftting the test data with the least squares method,and the structure of the module mechanical test platform is determined.Te modal analysis is carried out to determine the fundamental frequency and vibration modes of the mechanical test platform.Te vibration response of the platform is simulated by sine,random,and swept frequency vibration simulations. Te response surface ftting algorithm is verifed by the test platform swept frequency test.Te agreement between the response surface ftting algorithm and the experiment is good.Te fundamental frequency of the test platform is 436.2 Hz (>300 Hz),which meets the design index requirements of the test platform and can accurately guide the optimization design work.At the same time,it provides the theoretical basis and design method for the structural design of the Chinese manned space station.